Unknown hackers have been able to leak sensitive data from the database of the InvestBank of the United Arab Emirates (UAE).

Someone uploaded a 10GB file online with a range of sensitive financial data from the bank including credit card details and passport scans. Initial analysis of the ZIP file shows that it contains tens of thousands of credit card numbers, names and addresses of the customers of the bank. The upload includes folders listed as 'Account Master', 'Customer Master' and 'Branch Master'.

One of the spreadsheet named 'Cards' has details of more than 18,000 card numbers. Other folders on upload contain 3,383 individual bank statements, which are all watermarked and labelled from the bank. Another file called 'Passports' includes internal files including scans of ID cards, business cards, passports, insurance cards and corresponding customer details.

The data breach comes just a week after a similar leak of sensitive financial informationonline from the database of the Qatar National Bank (QNB). The data was published by whistleblowing website Cryptome on 25 April. Experts believe that a group called the 'Bozkurt Hackers' - also known as the 'Grey Wolves' is behind the breach. An anonymous Twitter user - under a Bozkurt Hackers profile had claimed responsibility of the breach.